Song Kang-ho
Sang-hyun
Bae Doona
Su-jin
Gang Dong-won
Dong-soo
Choi Hee-jin
Mi-sook
Choi Hyo-sang
Doctor
IU
So-young
Park Hae-jun
Mr. Yoon
Song Sae-byuk
Orphanage Director
Oh Hee-jun
Choi's Subordinate
Lee Moo-saeng
Seon-ho
Kim Sun-young
Orphanage Director's wife
Kim Sae-byuk
Song's Wife
Lee Dong-hwi
Mr. Song
Kim Do-yeon
Seon-ah
Seong Yu-bin
Young-min
Kim Soo-hyeon
Babybox Baby 3
Lee Joo-young
Detective Lee
Lee Yoo-joo
Little Girl at So-young's House 1
Baek Hyun-jin
Detective Choi
Kim Yae-eun
Im's Wife
Lee Dong-hyeon
Teenager 2
Park Kang-seop
Si-woo
Ryu Kyung-soo
Tae-ho
Kang Gil-woo
Mr. Im
Yun Seul
Babybox Staff 1
Jeong Jong-yeol
Babybox Pastor
Kim Keum-soon
Ms. Park
Jong Ho
Young-gil
Lee Ga-eun
Subway Announcement (voice)
Park Jong-hyeon
Detective 1
Lee Ga-kyung
Nurse 2
Lim Seung-soo
Hae-jin
Jung Ji-woo
Yoon's Wife
Ryu Ji-an
Yun-ah
Park Ji-yong
Woo-sung
Lee Doo-seok
Gyu-seok
Lee Do-goon
Police Officer
Kim Joo-eun
Little Girl at So-young's House 3
Choi Yoon-woo
Orphanage Kid 2
Woo Sung-min
Orphanage Kid 1
Lim Ga-Young
19-Years-Old Girl at So-young's House
Hwang Do-yoon
Babybox Baby 1
Lee Ye-seo
Ye-seo
Yang Gwon-seok
Taxi Driver
Na Gyeong-cheol
News Anchor (voice)
Jang Hye-min
Babybox Staff 2
Yoon Sang-hak
Granny in front of the Laundromat
Lee Do-gyoo
4-Year-Old Woo-sung
Kang Gyoo-rin
Little Girl at So-young's House 2
Park Yeong-joon
Orphanage Staff
Bae Ga-jin
Babybox Nanny 1
Kim Jin-ah
Babybox Nanny 2
Son Yeong-ok
Sang-hyun's Mother
Jeong Myeong-yeon
Sang-hyun's Wife
Park Geon-woo
Young Dong-soo
Choi Gi-sang
First Director of the Orphanage
Park Byeong-gwan
Second Director of the Orphanage